blob: f68b9552eaebb52493047c74cd09f5abca8b9621 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
using System;
delegate void Handler<T> (object sender);
interface IBar<T> {
event Handler<T> Handler;
}
class Foo<T> {
IBar<T> proxy, real;
event Handler<T> handler;
Handler<T> proxyHandler;
public event Handler<T> Handler {
add {
if (handler == null) {
if (proxyHandler == null)
proxyHandler = (object s) => handler (proxy);
}
handler += value;
}
remove {
handler -= value;
}
}
}
class Program {
public static int Main ()
{
var x = new Foo<int> ();
x.Handler += null;
return 0;
}
}
|
